In this paper, a Mo/Si multilayer mirror of normal incidence at E=60eV was firstly analyzed. From the measurement curves of a small angle x ray diffraction, the property of interfaces and the parameters including period thickness and roughness were gained. Through the analyzing, we found that performance is not good, the peak reflectivity is low and is not correspond with 60eV. Secondly, a revised design using Simulated Annealing arithmetic was applied in it. The revised design results shows a promising mirror at 60eV and are consistent with the results of the program of optical coating technology R&D center in Shanghai Institute of Optics and Fine Mechanics.
Under the constraints of the number of transceivers per node and wavelength continuity, the fairness issue of connections with different bandwidth granularities in survivable traffic-grooming WDM mesh networks is investigated. An extended wavelength-plane graph (EWG) model and two dynamic grooming path protection algorithms with considering blocking fairness are proposed. Based on dynamic traffic with different load, the performance of our schemes has been evaluated via simulations. The results show that they provide good blocking fairness while at the same time ensure a small increase in the overall traffic blocking probability.
In order to acquire high reflectance, how to select the thickness d<SUB>H</SUB> and d<SUB>L</SUB> of the high and low atomic numbers materials should be considered first of all in the design of soft x-ray multi-layer. This paper introduced a simple design method based on matrix method. In the design process of a multi-layer mirror using Mo/Si at (lambda) equals 13.1 nm and normal incidence, its reflectance reaches 67.0 percent when layers are 30. Compared with other method, although its reflectance is a bit lower, it is a simple and practical method.